<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <style>
    * {
      margin: 0px;
      padding: 0px;
    }

    @media only screen and (device-width: 750px) {
      html {
        font-size: 100px;
      }
    }

    @media only screen and (device-width: 375px) {
      html {
        font-size: 50px;
      }
    }

    @media only screen and (device-width: 320px) {
      html {
        font-size: 42.666px;
      }
    }

    @media only screen and (device-width: 414px) {
      html {
        font-size: 55.2px;
      }
    }

    div {
      font-size: 0.75rem;
    }

    img {
      width: 3.75rem;
    }
  </style>
</head>

<body>
  <div>牧童骑黄牛歌声振林樾</div>
  <img
    src="https://mp.weixin.qq.com/mp/qrcode?scene=10000004&size=102&__biz=MjM5ODI2MTQxOQ==&mid=2653653630&idx=2&sn=376caa816a8edbacc288fa195fa4b4d1&send_time="
    alt="">
</body>

</html>